2 Answers
2

The effect you described is simply achieved by duplicating the shape, changing it to outline, moving it up a bit and putting it in the background.

What the website you linked to describes is a concept of creating a depth perception. The examples you have given are not meant to represent the final design but how this effect is basically executed. The final design should be detailed and represent the function of the app. This is a lot more work than the effect you asked for.

Yes, I know that I have to do more than just this but all the other stuff is not my problem at the moment. I hoped for some more detailed instructions. So if you'd explain step by step how you created the icon, I'd be happy.
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JulianJul 6 '12 at 16:04

you want exactly this design? it's just an example
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KMSTRJul 6 '12 at 21:47

No, I just want instructions how to create this 3D effect starting from the flat logo in Inkscape.
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JulianJul 7 '12 at 10:20

You could start how I described it. But I would strongly sugest going to Photoshop for texturing.
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KMSTRJul 8 '12 at 6:26

KMSTR's description is fairly straight forward. Which part are you having trouble with, Julian?
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DA01Jul 8 '12 at 16:51